A copartnership consisting



A. A. BITTER.

VULCANIZER.

APPLICATION man $591.12. 1911.

Patented Aug. 10, 1920.

w m m 2 m ,5 hm 2 u/ E s a f q? 9 z UNITED STATES PATENT OFFICE.

ARTHUR. A. BITTER, 02 LOS ANGELES. CALIFORNIA,

ASSIGNOB, BY MIR-SHE ASSIGN- HINTS, T0 WEQTERN VULCANIZER MANUFACTUBJNG COMPANY, OF CHICAGO,

ILLINOIS,

K. WHEELOCK, FRANK A.

VULCANIZEH.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed September 12, 1917. Serial No. 190,948.

To all whom it may concern:

Be it known that I, ARTHUR A. Brr'rnn, a citizen of the United States, residing at Los Angeles in the county of Los Angeles and State oi California, have invented new and useful -Im rovements in Vulcanizers, of which the 0 lowing is a specification.

This invention relates to improvements in vulcanizers such as are used in repairing pneumatic tires, and resides in the provision of a device of this character which is particularly constructed and operated so that an entire section of a tire may be vulcanized'in place, in a neat, expeditious and reliable manner.

One of the objects of the invention is to provide a vulcanizer of the above mentioned character in which a tire may be neatly repaired in such manner that mold marks or lines which appear at points on the tire where ends of the vulcanizing iron engage, are eliminated.

Another object is to provide in a vulcan-- izer of the above named character a means in the form of an interchan cable matrix which will cause the tread o a section of a tire which is being, vulcanized in place, to take on the appearance of the particular tire tread of the tire proper;

The invention ifurther consists in the parconstruction, association and mode of operation of the various parts and elements of the machine such as described in the following specification, illustrated in ,the accompanying drawings and finally as claims.

. Herotofore in repairing a tire by adding a section thereto a special mold was required and a special mold was likewise required in .retreadingr work. My invention aims to .provide asingle vulcamzer for use in retreading'as' well as in adding new tire sections and therefore reduces the cost of repairing tires, and provides a, saving of time, floor space andequipment.

In the drawings:

Fi me 1 represents a perspective view of a vu canizer. constructed in accordance with the present invention.

r Fig. 2 is a fragmentary sectional view taken on line (I12332 of Fig. 1.

defined in the appended Fig. 3 is a top plan view of the block comprising the means for preventing the making of mold-marks.

ii 1g. 4 1s a. fragmentary vertical sectional view of a part of the vulcanizing iron showing the block shown'in Fig. 3 attached thereto, and, A

Fig. 5 is a detail perspective View of the matrix shown in position in Fig. 2.

Referring in detail to the arcompanyin drawings in which like parts are designated by like reference characters throughout the several views. 1 designates a stand compris ing standards 2 having feet 3 and an upper structure 4.

A hollow vulcanizing iron generally des ignated is secured upon the stand 1 and is of arcuate formation having); a central depending tank portion (3. The tank por-, tion (3 isisecured by bolts 7 and nuts 8 or otherwise fastened to the upper structure 4 of the stand J. and contains water. A burner I) is located under the tank (3 be tween the sides of the structure 4: and mav have a connection not shown with a. suitable fuel supply also not'shown.

(onnectcd with the iron 5 at one end thereof is a pipe 10 having a filling' cup 11 and an escape valve 12 connected therewith. A valve l-l is associated with and controls the filling cup. Lateral flanges 15 are formed on the up er curved edges of the iron and upper sur aces for cooperation with clamps 16 provided to hold the tire in place in the iron. These clamps coin )rise U-shaped body portions 17 and screw volts 18 threaded in the bight portions thereof,

- the ends of the body portions being formed extensions are curved or arcuately formed and their inner siles are flush. preferably with the sides of the groove or concavity 19.

By forming the flanges of hollow construction the heat distribution. of the iron is muterially increased and. it will be seen that the flanges comprise means for supporting and conveying heat. through. bend molds of o dinery construction. not shown. to the sides of a section to lie vulcanized. so that a; thorough and reliable minimizing action will take place throughout the entire area of the section of the tire being; repaired. Said nietallic. inasmuch as the only requirement is the provision of mold extremities or cx tensions at the ends of the extremities which are arranged. formed and constructed to re turd the transmission of heat to the tire.

The inner faces of the clocks are formed with concevities or grooves 23, said grooves being registered with the groove 19 in the iron and adapted to receive a tire when the latter is clamped to the iron. Jhc grooves in these blocks increase in depth and in width from their lower or inner ends to their upper or outer ends, or in other Wordia, the Walls of the grooves diverge in all directions from the lower edges to the upper edges of the blocks. wherefore each groove 23 flures throughout its length from its inner end to its outer end, so that said walls gradually dim. i from tire engaging osition and do not offer an abrupt or are edge or curfew to cause a mold mark. The heat from the won 5 does not affect the w coil blocks as readily as it would motel blocks iii) and the use of wood in this m preveiits the causing of marks by heat upon the tire its in the ciise with the ordinary vulcanizers.

There is also provided a SQOiZlOhtlll'hlltI'lX 24 for molding the insert or section trend to correspond in appearance to the treadof the tire being repaired. This matrix is curred in cross section and of arcuatc for motion longitudinally so as to lie in the groove 19 of the iron 5 and is interchangeable or removable. The matrix shown is adopted to rih the tread of a section. or of a complete new trend so as to make the tire take on the appearance of u ribbed tread. The design oi the mold or matrix may he as desired. The matrix, in being sectional may be easily removed from the tire.

To vulcanize e tire with the hereinbefore described vulcanizer, so as to vulcauize a section or new trend. in. place, the tire illfter being properly prepared is )luced within groove 1.9 of the iron 5. If the tire section or new trend is to be molded to take on the appeerumro of the main tire trend or it is desired to import it ribbed appearance to n new trend. the matrix :24 is first put in place in the groove 19 of the iron end the sec tion of the tire is placed upon said matrix. The tire and section are clamped in place by the clamps 16 end the burner 9 is ignited so as to heat the iron 5 in the ordinary manner to provide a. vulcunizing aclion. The extensions or flanges 21 embrace and engage the sides of the bead molds, not shown, so as to support them and convey heat therethrou' h to the tire and section at these points. he vulcanizing action is in this Way carried out throughout the entire area of the jun'cturb of tire and se tion. The wood blocks 22 do not become so heated and are not hard enough that the tire will be marked in an unsightly manner thereby,

owing to the mrticularly formed grooves 23 therein whit! 1 diverge from engagement with the tire and do not offer sharp edges for engagement therewith It will thus be seen in reference to the foregoing" description and accompanyingdrawin s that I have provided a simply constructed, inexpensive and comparatively small vulcanizer with which tires may be ex i-eptlonally neatly, lastingly, efiectively, cheaply and quickly repaired.

It will be seen that the extremities or blocks 22 at the ends of the mold are removable, the fastening means employed being preferable in the form'of screws. By providing for the removal of these blocks it is possible to readily renew them when worn or in case they should not fit properly. In some instances when the matrix.- is being used and the ends of the matrix are disposed ediaceni; to the inner ends of the blocks it will be necessary tolit blocks to the mold of such character that the grooves therein will come flush Witlf'tlie outer "of "the matrix. This is necessary in. order to avoid the forming otmold marks upon the tire.

The "foregoing description and accompanying drawings describe and illustrate the preferred embodiment of the invention and it to. be understood that various minor changes in details of construction and as to the size. shape and proportion of parts of the vulcanizer, concurrent with the adoption thereof. may be resorted to when required, without departing from the spirit and scope of the invention as defined.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

and a block of nonmetallie material secured groove in the vulcanizing iron of the meek flaring througholit 15 to one end of the iron and having a groove forming a continuation of the tire receiving the groove its length 'from its inner end to its outer end to prevent marking of a tire under treatment in the vulcanizer. A

2. A vulcanizer, comprising a mold having a tire-receiving groove therein, and means at the ends of the mold for retarding heat retention and transmission, said means having tire-receiving grooves re 'sterin with the tire-receiving groove in t e mol said last named grooves being diverged in all directions from their inner to their outer ends.

3. A vulcenizer comprising a mold having a tire receiving groove therein and a grooved tenninal member at one end of the mold said terminal member being of heat nonconducting material and having its groove forming a continuation of the groove in the mold and also flaring throughout its length outwardiy from its joint with said mold groove to prevent marking of a tire under treatment in the vulcanizer.

4. A vulcunizer comprising a mold having a tire receiving groove therein and a grooved terminal member at one end of the mold, said terminal member being of heat nonconducting material and having its groove forming a continuation of the groove in the mold and also flaring throughout its length outwardly from its joint with said mold grooveto prevent marking of a tire under treatment in the vulcanizer, and a matrix for the grooved portiolrof said terminal member and configured to produce configuration upon the tire under treatment.

5. A vuleenizer mold having a longitudinslly curved tread forming face having ends retreating outwardly from the normal circle of its central portion. 7

6. A vulcenlzer comprising a mold having a tire receiving groove therein, and individual grooved terminal members at the respective ends of the mold, each terminal v member being of heat nonconducting material and its 'groove forming a continuation of the groove in the mold and also flaring throughoutthe length of the terminal member outwardly from its joint with the said groove to prevent marking of a tire under treatment 111 the vulcanizer.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR A. BITTER.

Witnesses:

CHAS. J. OHANES, J. SHUTI. 

